운행선상 장대 침하구간 콘크리트 궤도 인상공법 적용성

If settlement occurs relatively long ground areas on which the rail system is in service, the restore methods shall be thoroughly reviewed considering in many aspects, including serviceability and functionality. In the new rail systems, the restore shall be targeted to the design level. In the in-service rail systems, two methods can be considered. The first one is to restore the whole area as multi-steps by unit to unit while the second one is to restore the whole area as a single step. New methods that are applicable to concrete ballast uplift in the ground settled area have been proposed in this study. In these methods, the work procedures are simple and precise, the uplift can be done with less human efforts.